<template>
  <el-form ref="form" v-if="model" :validate-on-rule-change="false" :model="model" :rules="rules" v-bind="$attrs">
    <template v-for="(item, index) in options" :key="index">
      <el-form-item v-if="!item.children || !item.children!.length" :prop="item.prop" :label="item.label">
        <component
          v-if="item.type !== 'upload' && item.type !== 'editor'"
          v-bind="item.attrs"
          :is="`el-${item.type}`"
          :placeholder="item.placeholder"
          v-model="model[item.prop!]"
        >
        </component>
        <el-upload
          v-if="item.type === 'upload'"
          v-bind="item.uploadAttrs"
          :on-preview="onPreview"
          :on-remove="onRemove"
          :on-success="onSuccess"
          :on-error="onError"
          :on-progress="onProgress"
          :on-change="onChange"
          :before-upload="beforeUpload"
          :before-remove="beforeRemove"
          :http-request="httpRequest"
          :on-exceed="onExceed"
        >
          <slot name="uploadArea"></slot>
          <slot name="uploadTip"></slot>
        </el-upload>
        <div class="full-screen-container">
          <div id="toolbar" v-if="item.type === 'editor'" style="z-index: 101"></div>
          <div id="editor" v-if="item.type === 'editor'" style="height: 200px; z-index: 100"></div>
        </div>
      </el-form-item>
      <el-form-item v-if="item.children && item.children.length" :prop="item.prop" :label="item.label">
        <component v-bind="item.attrs" :is="`el-${item.type}`" :placeholder="item.placeholder" v-model="model[item.prop!]">
          <component v-for="(child, i) in item.children" :key="i" :is="`el-${child.type}`" :label="child.label" :value="child.value"> </component>
        </component>
      </el-form-item>
    </template>
    <el-form-item>
      <slot name="action" :form="form" :model="model"></slot>
    </el-form-item>
  </el-form>
</template>

<script lang="ts" setup>
import { PropType, ref, onMounted, watch, nextTick } from 'vue';
import { FormOptions, FormInstance } from './types/types';
import cloneDeep from 'lodash/cloneDeep';
import '@wangeditor/editor/dist/css/style.css';
import { createEditor, createToolbar, IEditorConfig, IDomEditor } from '@wangeditor/editor';
import { UploadFile, UploadFiles } from 'element-plus';

let props = defineProps({
  // 表单的配置项
  options: {
    type: Array as PropType<FormOptions[]>,
    required: true,
  },
  // 用户自定义上传方法
  httpRequest: {
    type: Function,
  },
});

let emits = defineEmits(['on-preview', 'on-remove', 'on-success', 'on-error', 'on-progress', 'on-change', 'before-upload', 'before-remove', 'on-exceed']);

let model = ref<any>(null);
let rules = ref<any>(null);
let edit = ref();

let form = ref<FormInstance | null>();

// 初始化表单方法
let initForm = () => {
  if (props.options && props.options.length) {
    let m: any = { username: '', password: '' };
    let r: any = {};
    props.options.map((item: FormOptions) => {
      m[item.prop!] = item.value;
      r[item.prop!] = item.rules;
      // 初始化富文本编辑器
      if (item.type === 'editor') {
        nextTick(() => {
          if (document.getElementById('editor') && document.getElementById('toolbar')) {
            const editorConfig: Partial<IEditorConfig> = {};
            editorConfig.placeholder = item.placeholder!;
            editorConfig.onChange = (editor: IDomEditor) => {
              // 当编辑器选区、内容变化时，即触发
              // console.log('content', editor.children)
              // console.log('html', editor.getHtml())
              // console.log('text', editor.getText());

              model.value[item.prop!] = editor.getHtml();
            };

            // 创建编辑器
            const editor = createEditor({
              selector: '#editor',
              config: editorConfig,
              mode: 'default', // 或 'simple' 参考下文
            });
            // 创建工具栏
            const toolbar = createToolbar({
              editor,
              selector: '#toolbar',
              mode: 'default', // 或 'simple' 参考下文
            });
            edit.value = editor;
          }
        });
      }
    });
    model.value = cloneDeep(m);
    rules.value = cloneDeep(r);
  }
};
onMounted(() => {
  initForm();
});

// 组件重写表单重置的方法
let resetFields = () => {
  // 1、重置element-plus 的表单
  form.value!.resetFields();
  // 2、重置富文本编辑器的内容
  if (props.options && props.options.length) {
    // 清空富文本内容
    edit.value?.clear();
  }
};

// 表单验证
let validate = () => {
  return form.value!.validate;
};

// 获取表单数据
let getFormData = () => {
  return model.value;
};

// 使用vue3的新api 分发方法，它替代了之前的$children方法
defineExpose({
  resetFields,
  validate,
  getFormData,
});

// 监听父组件传递过来的options
watch(
  () => props.options,
  () => {
    initForm();
  },
  { deep: true }
);

// 上传组件的所以方法
let onPreview = (file: File) => {
  emits('on-preview', file);
};

let onRemove = (file: File, fileList: FileList) => {
  emits('on-remove', { file, fileList });
};

let onSuccess = (response: any, file: File, fileList: FileList) => {
  // 上传图片成功， 给表单上传项赋值
  let uploadItem = props.options.find((item) => item.type === 'upload')!;
  model.value[uploadItem.prop!] = { response, file, fileList };
  emits('on-success', { response, file, fileList });
};

let onError = (err: any, file: File, fileList: FileList) => {
  emits('on-error', { err, file, fileList });
};

let onProgress = (event: any, file: File, fileList: FileList) => {
  emits('on-progress', { event, file, fileList });
};

let onChange = (file: UploadFile, fileList: UploadFiles) => {
  emits('on-change', { file, fileList });
};

let beforeUpload = (file: File) => {
  emits('before-upload', file);
};

let beforeRemove = (file: File, fileList: FileList) => {
  emits('before-remove', { file, fileList });
};

let onExceed = (file: File, fileList: FileList) => {
  emits('on-exceed', { file, fileList });
};
</script>

<style lang="" scoped></style>
